Gas Sensory System «Electronic Nose» Gaz -2

Description

The gas sensory system «Electronic nose» is intended for analysis of volatile organic compounds, alcoholic and nonalcoholic beverages, perfumes and toxic pollutants in the air.

The main principles of working:- array of quartz crystal resonators are covered with films of various organic sorptive materials (calixarenes, polymers) which have different sensitivity towards different volatile organic molecules analyzed. This device belongs to non-flow type, i.e. after injection of analyte vapor working cell is cut off and no flow of analyte occurs under measuring stage. Due to adsorption of analyte molecules onto sensitive surfaces of sensors frequency of quartz resonators is reducing. This frequency shift is considered as a sensor response. Obtained array of sensors responses to pulse of analyte vapor is used for “teaching” system and after that – for recognition of chemical image of analyte by means of special mathematical apparatus for statistical treatment (PCA, Neural Network, etc.). After measurements working cell and sensors are cleaned with fresh dry air.

Stage of Development

Prototype developed and tested

Contact Details

І.А. Koshets, Z.I. Kazantseva V. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine 41 Nauki Prospect, 03028 Kyiv, Ukraine Tel./Fax: (+38 044) 525 9798 Email:
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